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A novel, low-cost, and high-efficiency method for nitrocellulose synthesis from plasma-modified cellulose
Social support in a large general population sample over the course of six years
Abstract Social support is an important resource that is assumed to buffer the effect of stressful events on health. The aims of this study were to test psychometric properties of the ENRICHD Social Support Instrument (ESSI), to investigate the impact of several sociodemographic and behavioral variables on social support, and to analyze changes in social support over a 6-year period. A sample of 9,681 people from the general population was examined at baseline, 4,987 of whom were surveyed at a follow-up examination six years later using the ESSI and several other questionnaires. The psychometric properties of the ESSI were good (Cronbach’s α = 0.91) and measurement invariance across gender and age could be established. High socioeconomic status, sharing a household with others, and employment resulted in high levels of social support. Tobacco smokers and alcohol drinkers reported having less social support than nonsmokers and non-drinkers. During the 6-year period, the mean level of social support remained nearly unchanged (d = 0.01). The data provide a framework for the interpretation and comparison of social support with other clinical and nonclinical populations. Public health initiatives should aim to prevent social isolation to improve public health.
Cortical parcellation optimized for magnetoencephalography with a clustering technique
Comparison of different treatment modalities for perianal abscess in infants: a retrospective cohort study
Light intensity preferences of broiler chickens is affected by breed, age, time of day and behaviour
Optimal design of a multistage slope using the multi-verse optimization algorithm
The evaluation of the flow re-direction endoluminal device (FRED) for the treatment of selected intracranial aneurysms: a Polish multicenter study
Author Correction: The technological advancement environmental regulations and their impact on energy efficiency and CO2 emissions
Fine-tuning of the PPR protein directs the RNA editing activity toward C-to-U or U-to-C conversion
Pan-cancer analysis identifies ADAM12 as a prognostic biomarker and indicator of immune infiltration in glioma
RETRACTED ARTICLE: Novel gooseneck barnacle optimization a nature inspired technique for optimizing reactive power within systems of power with electric vehicles
How to bring health and happiness to your lab
Experimental and numerical analyses of the displacements and stiffnesses of a needle roller bearing under different conditions
Solid phase thermal conductivity model of alpine meadow soils based on fractal theory
Abstract The determination of thermophysical parameters is crucial in the hydro-thermal coupling calculations of permafrost. Alpine meadows can affect the heat exchange inside and outside the soil due to the well-developed root, which can have an impact on the stability of permafrost. At present, the research on the thermal conductivity of alpine meadows is less, and most of the research focuses on the thermal conductivity of rock and soil. In this paper, according to the distribution and development characteristics of roots in the soil, a theoretical model of thermal conductivity of root-soil in alpine meadow based on thermal resistance is established by using fractal theory. The reliability of the theoretical model was verified by introducing the established solid-phase thermal conductivity model into the geometric mean model. The effects of the ratio of root area to total area(RRATA), tortuosity fractal dimension, and area fractal dimension on thermal conductivity are analyzed. The model constructed in this paper provides a theoretical basis for further research on the physical model of thermal conductivity of meadow porous media.